Multilead head right and left spiral grinding mechanism



'March 3, 1936. E, E, JUDGE MULTILEAD HEAD RIGHT AND LEFT SPIRAL GRINDING MECHANISM Filed Jan. 7, 1955 4 sheets-sheet 1 INVENTOR Llw M/d W BY M $4.0m

ATTORNEY March 3, 1936.

E. E. JUDGE MULTILEAD HEAD RIGHT AND LEFT SPIRAL GRINDING MECHANISM Filed Jan. 7, 1955 4 Sheets-Sheet 2 m N; MW M m n m 7 m A Q, W A i w B \PQ] N W u y m\ /m r mm m\ 8 ON RQ m March 3, 1936. E. E. JUDGE 2,032,938

MULTILEAD HEAD RIGHT AND LEFT SPIRAL GRINDING MECHANISM Filed Jan. 7, 1955 4 Sheets-Sheet 3 ATTORNEY E. E. vJUDGE Marh 3, 1936.

MULTILEAD HEAD RIGHT AND LEFT SPIRAL GRINDING MECHANISM I 4 Sheets-She et 4 Filed Jan. 7, 1935 INVENTOR 5 5M AITORNEY Patented Mar. 3, 1936 UNITED STATES PATENT OFFICE GRINDING MECHANISM Edward E. Judge, Lansing, Mich. Application January 7, 1935', Serial No. 804

Claims.

This invention relates to multi-lead head right and left spiral grinding mechanism, or kindred apparatus. The object of the invention is the production of means to form and grind both right 5 l and left hand spiral milling cutters, hobs or the like. This invention may be used to inspect or check up the size, form, inclination and disposition of spiral grooves of any description. The invention can be used in connection with any -machine, no special table or outside equipment being required.

In the accompanying drawings the special construction and combination of the parts of this invention are illustrated.

Fig. 1 represents a side or face view, showing all parts assembled.

Fig. 2 is a vertical section on the broken line 22 of Fig. 1.

Fig. 3 is a partly sectional rear view of the front portion carrying the main worm wheel, showing its operating and adjusting means.

Fig. i is a horizontal sectional View on the broken line i4 of Fig. 1, showing the worm wheel, the cylindrical rack and shaft actuating devices interiorly carried by the casing.

Fig. 5 is a partly sectional view lengthwise of the shaft showing the special construction thereof.

V Fig. 6 is an end view of the shaft and cross section of the implement holder therein, showing the orifices for the adjustment of the holder.

Fig. 7 is an interior view of the rear portion of the casing showing the shaft in position, and

the two geared slides in one of the various adjustments thereof.

Throughout the drawings and description the same number is used to refer to the same part.

Considering the drawings, a casing of any desired form has the separable front and rear portions l and 2. Revoluble within and carried by the front of the casing is the main worm wheel 3. A hand wheel shaft 4 has a bearing centrally in the front of the casing, and a hand wheel 5 is located on the outside. Diametrically and rotatively carried by the Worm wheel is a cylindrical spiral gearing comprising the members 6 and I, and it will be noted in Fig. 4 that the member 6 has a mitre gear end and the hand wheel shaft has a mitre gear 4 in engagement with the like end of member 6. It is also illustrated in Fig. 4 that the gearing member I and member 6 have an axial line that is common to both gearing members. Pivot pins 8 and 9 carry the gearing members in the worm wheel in revoluble relation thereto. The member 6 is connected with the member I by a key In.

Movable across the inner face of the worm wheel is a geared slide ll engaging the cylindrical rack and, therefore, adapted to be adjusted by the hand wheel. By means of pivot pin 12 the slide II is connected with a second geared slide 13, which engages a gear 14 on the shaft. The shaft ordinarily comprises two members [5 and I6 coupled by the gear M as hereinafter described. Slide ll moves in the guideway l1, and the shaft is supported in a yoke l8 which is provided with a guideway l8 for the second slide l3. The guideway I1 is arranged diametrically upon the worm wheel 3. Therefore, when the wheel is turned the slide II will take up an inclined position as shown in the Fig. 7 with respect to the second slide l3; The pin l2, however, is a pivot pin and pivotally connects the slide l l and the second slide l3, and does not disturb the relative operating positions'of the slide l3 and gear M on the composite work-holding shaft 3-46. The use of the word geared in this'description with reference to the slides I I, I3 and cylinders 6 and 1 and other parts, is intended to mean that they are provided with gear teeth in the usual manner. Considering Fig. 4, it will be understood that the yoke [8 provides the guideway l8 for the second slide l3. With the parts as illustrated in the figure, rotation of the cylinders 6 and 1 will move slide ll lengthwise, and through the pin l2 will at the same time move the second slide l3 sidewise, and the pressure of the yoke l8 against either of the shaft portions H5 or IE will move the shaft correspondingly lengthwise. But if the slide II, by reason of the rotary adjustment of the worm wheel 3 is inclined to the second slide, it will move the second slide sidewise as well as lengthwise, and the inclination of the slide ll modifies the form of the spiral movement thus created.

As best shown in Figs. 1 and 3, themeans for rotating the main worm wheel 3 comprises the worm l9 at the top of the front. of the casing, rotated by the thumb piece 20 secured by key 20' to the axis 2| of the Worm. A scale 22 on the thumb piece coordinates with a degree mark 23 upon the housing 24 of the worm. Those parts enable the main worm wheel to be turned within the easing into any position indicated by the scale 25 in aperture 26 in the front of the casing in correlation with the degree mark 25' upon the boundary of aperture 26.

Considering Fig. 5, there will be noted at the end of the shaft portion l6 cylindrical sleeves constituting an implement or work holder. The outer sleeve 21 carries a head 28 movable in a bore 29 in the end of the sleeve. The head 28 has an axial pin 30 which projects sufiiciently to engage either of the circular series of orifices 3| in the end of shaft portion l6, which end is customarily slightly increased in diameter as shown. The end of the pin 30 of the head may a be withdrawn by means of the thumb piece 32 against the force of the encircling spring 33. Within the sleeve 21 is a concentric sleeve 34,

secured removably by the set screw 35. This invention is not intended to be limited to the special construction of the holder as illustrated and described. In Fig. 5 is also shown aconvenient and desirable construction of the shaft. .The gear l4 has the cylindrical extensions 36 and 31 secured by the set screws 38 and 39, thereby coupling the shaft portions [5 and [6.

As best shown in Fig. 4, there are provided, usually at diametrical points of the front of the casing clamp screws such'as screw 40, having head 4| within the casing and thumb piece 42 without, and likescrew 43 having head 44 and thumb'piece 45. The heads 4| and 44 engage circular edge portions of the worm wheel 3, and act to clamp the wheel in any adjusted position within the front of the casing;

As best shown in Figs. 4 and 7, the composite shaft is supported so that it may be moved length- Wise or revolved, in bearing extensions of-the rear of the casing; The bearing 46 has usually the bushing 41 and the bearing 48 on the other side of the casing has a like bushing 49.,

In the operation of this invention, it will be noted that after the main worm wheel is set in position whatever may be the inclination'ofthe first geared slide II on the inner face of the wheel its pivotal connection with the second geared slide moves the composite shaft lengthwise and at the same time rotates the shaft. It will be understood that this apparatus is a spiral feed mechanism for feeding work on a spiral mill towards a grinding wheel,- so thatthe correct clearance of the cutting flutes may be maintained, and the amount of twist desired may be selected and indicated on an index or indi- V manner of its use, I claim:--

1. In mechanism" of the characterdescribed, the-combination with a casing, of a hand wheel and shaft carried by the casing, a main'worm wheel carriedby the casing, means for rotating said Worm wheel, a cylindrical spiral toothed gear carried by said worm Wheel and actuated by the hand wheel, a toothed slide engaging said cyl- In mechanism of the character described,

the combination with a casing, a hand wheel and shaft carried by the casing, a main worm wheel carried by the casing, means for rotating the worm wheel, a cylindrical spiral toothed gear carried by the worm wheel and. actuated by the hand wheel, a toothed slide engaging said cylinder and carried by the worm wheel, a sliding and revoluble shaft, a yoke carried by the casing and adapted to support said shaft, an adjustable implement holder carried by the shaft, a gear toothed portion on the shaft, a second toothed" slide carried bythe yoke and engaging the gear on saidshaft, said slides being 'pivotally connected, means for securing the main worm wheel in' position in the casing, and means for indicating the rotated position of the main worm wheel.

3. In mechanism of the character described,

a longitudinally movable and revoluble shaft, a

casing supporting the shaft, a main worm wheel supported by the casing in revoluble relation,.a'

cylindrical spiral toothed gear carried by said wheel, means for rotating the cylinder,'and devices actuated by said cylinder'for giving saidshaft a combined rotary and longitudinal movement.

' 4. In mechanism of the character described, a longitudinally movable and revoluble shaft, a

casing supporting the shaft, a main worm wheel supported by the casing in revoluble relation, a

cylindrical spiral toothed gear carried by said Wheel comprising two members having a common axial line, means for revolving one of said members, means for revolving the worm wheel, and devices actuated by the said cylinder for giving the said shaft a combined rotary and longitudinal movement. I

5. In mechanism of the character described, a casing, a main worm wheel in the casing, means for rotating the worm wheel, means arranged at separated points on the outside of the casing for securing the worm wheel, a cylindrical spiral toothed gearing carried by the wheel in revoluble relation, said gearing comprising two separable members, a hand Wheel on the exterior of the casing, a hand wheel shaft, one of said gearing members having 'a mitre toothed gear, and the said hand wheel shaft having a mitre toothed gear in engagement with the mitre gear of the said rack member.

" EDWARD E. JUDGE. 

